P0743 Torque Converter Clutch Circuit Electrical P0750 Shift Solenoid "A" P0765 Shift Solenoid "B" A Hyundai dealer would have the proper scan tool and tester to verify and perform actuation tests on...P0743 HYUNDAI Meaning The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled.